Page 17 - Water_Controls_for_Healthcare

HOSPITAL
DELABIE’s solutions for water and energy savings / SOLUTIONS

DELABIE’S SOLUTIONS Conventional DELABIE
FOR SAVING WATER AND ENERGY mixer mixer
5 lpm
9 lpm
0% 45%
Patients or residents tend to wash at a basin rather than DELABIE’s electronic mixers for washbasins:
take a shower as they have reduced autonomy 85% water savings
(e.g. those weakened by illness, the elderly, semi- Compared to conventional mixers, DELABIE’s
bedridden patients, those recovering from surgery, etc.). electronic controls can offer maximum water savings.
Washing at the washbasin takes longer (14 - 20 minutes) They ensure the manager’s water bills can be reduced
than showering (8 - 10 minutes on average) whilst preserving user comfort.
and involves a significant volume of water.
Automatic shut-off and split delivery
The mixer or tap shuts off automatically when hands
Average water consumption are removed from the detection zone. This removes 4.8L 2.7L
per person per day: the risk of waste through negligence. The flow time is
reduced to the necessary minimum (wetting, rinsing).
Domestic consumption: 32 sec. 32 sec.
137 litres per day per person Regulated flow rate
Hospitals or similar: Some of DELABIE’s electronic mixers and taps Water savings per use
with DELABIE’s mechanical mixer
300 - 450 litres per day per bed are regulated at 4 lpm. The majority of DELABIE’s
Retirement homes or care homes: electronic mixers and taps are, however, regulated
at 3 lpm. The flow rate remains constant regardless
up to 250 litres per day per bed of pressure variations in the system. Open at 100%:
5 lpm
100%
Source: Information Centre for Water (CIEAU) Water Agency, Loire Brittany
DELABIE’s mechanical mixers for washbasins: 0%
45% water savings Closed
Most mixer manufacturers regulate the flow rate
inside the cartridge or at the mixer outlet. This inevitably
creates counter pressure in the mixer, resulting DELABIE’s mechanical mixer
in cross flow between the hot and cold water.
DELABIE’s basin mixers with ceramic cartridges are Conventional DELABIE
fitted with a flow rate limiter at the hot mixer mixer
4 lpm
9 lpm
and cold water inlets to achieve 5 lpm at the outlet. 0% 85%
The water savings achieved are about 45% and user
comfort is maintained. Controlling the flow rate at
the inlet instead of the outlet prevents cross flow
between hot and cold water, which causes
the proliferation of bacteria upstream of the mixers.

WATER SAVINGS IN HEALTHCARE FACILITIES
The purchase cost of a DELABIE mixer can be covered by the water savings achieved 4.8L 0.8L
A comparison between a domestic mixer at 9 lpm, a DELABIE mixer at 5 lpm and a DELABIE electronic mixer
at 4 lpm. The price per m of mixed water is £10.31 excl. VAT. 32 sec. 12 sec.
3
Water savings achieved in a 400 bed hospital Conventional DELABIE DELABIE Water savings per use with
(patient rooms) mixers mixers electronic mixers DELABIE’s electronic mixer
Number of beds 400 400 400
Points-of-use for hand washing BASIN BASIN BASIN
Average length of flow/day/bed 20 min. 20 min. 7.5 min.
Number of days used/year 290 290 290
Mixer consumption in lpm 9 5 4
Annual consumption in m 3 20,880m 3 11,600m 3 3,480m 3
Annual consumption in £ £215,273 £119,596 £35,879
Annual consumption per mixer in £ £538 £299 £90
Annual saving excl. VAT £95,677 £179,394
DELABIE’s electronic mixer

Hospital solutions 15